Re: SCSI Card

[Wayne Stewart <waynes@intergate.ca>]

David Empson wrote:
 
> Wayne Stewart <waynes@intergate.ca> wrote:

> > The Hi-Speed SCSI card would be better yet. It's a little faster
> 
> A "little" faster?  It is noticeably faster in ProDOS-8, and a lot
> faster in GS/OS.

Maybe I lack perception but most of the time unless I open the computer 
and look I usually have trouble telling them apart speed wise. I almost 
need to run them side by side to see the difference.
 
> The RamFast SCSI card is a lot faster than the Apple High-Speed SCSI
> card if you are running ProDOS-8, but isn't much better than the Apple
> card in GS/OS.  (If anything, the theoretical peak performance of the
> Apple card will beat the RamFast, but you are unlikely to achieve this
> without specially written software.)

Maybe theoretically but I've timed the Apple Hi-Speed and Ramfast doing 
various things in GSOS and the ramfast usally outperforms the Hi-Speed 
SCSI card about 2-1. That's using the same computer and hardware, just 
switching SCSI cards. Maybe at lower speeds the Apple card looks better 
but at 15mhz the Hi-Speed SCSI card is so much slower that sometimes 
when I'm using one I think the IIgs has crashed. I've tried it with 
several Apple Hi-Speed SCSI cards and the Ramfast always wins by a huge 
margin. With my Ramfast I shift boot my system in 7 seconds, the
Hi-Speed 
takes 16 seconds
 
Wayne